A public safety answering point (PSAP) receives thousands of security alerts and attends a simila... more A public safety answering point (PSAP) receives thousands of security alerts and attends a similar number of emergencies every day, and all the information related to those events is saved to be post-processed and scrutinized. Visualization and interpretation of emergency data can provide fundamental feedback to the first-response institutions, to managers planning resource distributions, and to all the instances participating in the emergency-response cycle. This paper develops the application of multiple correspondence analysis (MCA) of emergency responses in a PSAP, with the objective of finding informative relationships among the different categories of registered and attended events. We propose a simple yet statistically meaningful method to scrutinize the variety of events and recorded information in conventional PSAPs. For this purpose, MCA is made on the categorical features of the available report forms, and a statistical description is achieved from it by combining bootstr...
The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge of the desired syste... more The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge of the desired system's behavior to be included as IF-THEN linguistic rules for the control of dynamical systems where either an analytic model is not available or is too complex due, for instance, to the presence of nonlinear terms. The computational structure requires the definition of the FLC parameters namely, membership functions (MF) and a rule base (RB) defining the desired control policy. However, the optimization of the FLC parameters is generally carried out by means of a trial and error procedure or, more recently by using metaheuristic nature-inspired algorithms, for instance, particle swarm optimization, genetic algorithms, ant colony optimization, cuckoo search, etc. In this regard, the cuckoo search (CS) algorithm as one of the most promising and relatively recent developed nature-inspired algorithms, has been used to optimize FLC parameters in a limited variety of applications to determine the optimum FLC parameters of only the MF but not to the RB, as an extensive search in the literature has shown. In this paper, an optimization procedure based on the CS algorithm is presented to optimize all the parameters of the FLC, including the RB, and it is applied to a nonlinear magnetic levitation system. Comparative simulation results are provided to validate the features improvement of such an approach which can be extended to other FLC based control systems.
The construction of an efficient and reliable re-entry capsule has played and continues to play a... more The construction of an efficient and reliable re-entry capsule has played and continues to play a fundamental role in the space activities. Current applications include International Space Station sample return, the delivery of networks of small stations to the Martian surface, and the return to Earth of launcher upper stages. Recently (1), (2) attention has been paid to the possibility
This paper describes the software construction methodolo gy embedded in the P-RIO environment, fr... more This paper describes the software construction methodolo gy embedded in the P-RIO environment, from the point of view of modularity, para llelization and graphic configuration of applications. It is presented, as an exa mple, the parallelization of an artificial vision system that uses artificial neural networks for image recognition. This application, that requires a lot of CPU time, had its
This paper describes the support of the software construct ion methodology embedded in a version ... more This paper describes the support of the software construct ion methodology embedded in a version of the RIO environment built on the PVM platform. This strategy attempts to combine in a single environment the high-level facilities prov ided by RIO to make parallel and distributed systems, and the portability offered by the P VM virtual machine that is supported in
This paper describes P-RIO (Parallel Reconfigurable Interconnectable Ob- jects), an object-based ... more This paper describes P-RIO (Parallel Reconfigurable Interconnectable Ob- jects), an object-based software construction methodology, that provides high- level abstractions to build modular concurrent programs, facilitating software reuse and system development. It is also shown the graphic interface integrated to the P-RIO support environment, that provides facilities for configuration, de- bugging and management of parallel applications.
SUMMARY The action of different coagulants to remove Cryptosporidium during the process of water ... more SUMMARY The action of different coagulants to remove Cryptosporidium during the process of water treatment. Cryptosporidium is one of the microorganisms of main concern from the point of view of Public Health, being a priority problem for water treatment plants and water regulatory institutions. Due to its small size and resistance to chlorination, Cryptosporidium removal during the process of drinking water treatment is a hard task. The effectiveness of different coagulants commonly used in the process of removal of oocysts was analyzed. The technique used was the Jar Test. It was found that: 1) coagulants with the addition of polimeric coadjuvants produce over 2 logs of oocyst removal; 2) a low value in turbidity does not necessarily mean optimal parasite removal, and 3) the addition of polyelectrolites to ferric chloride diminishes variability, both in final turbidity and Cryptosporidium removal.
Journal of Neurology, Neurosurgery & Psychiatry, 2011
BackgroundDespite use in clinical practice and trials of thrombolysis, a non-contrast CT is not s... more BackgroundDespite use in clinical practice and trials of thrombolysis, a non-contrast CT is not sensitive for identifying penumbral tissue in acute stroke. This study evaluated how it compares with physiological imaging using CT perfusion.Methods40 imaging datasets with non-contrast CT (NCCT) and perfusion CT (CTP) were retrospectively identified. 2 sets of observers (n=6) and a neuroradiologist made a blind evaluation of
... Within the modified Newton's method (MNM), the tangent matrix is kept constant at each M... more ... Within the modified Newton's method (MNM), the tangent matrix is kept constant at each Moadstep and for all the j iterations. ... Further the consistent solution will be used within a new algor ithm (proposed by the author in the next section) in 222 E. CARRERA order to choose the ...
A public safety answering point (PSAP) receives thousands of security alerts and attends a simila... more A public safety answering point (PSAP) receives thousands of security alerts and attends a similar number of emergencies every day, and all the information related to those events is saved to be post-processed and scrutinized. Visualization and interpretation of emergency data can provide fundamental feedback to the first-response institutions, to managers planning resource distributions, and to all the instances participating in the emergency-response cycle. This paper develops the application of multiple correspondence analysis (MCA) of emergency responses in a PSAP, with the objective of finding informative relationships among the different categories of registered and attended events. We propose a simple yet statistically meaningful method to scrutinize the variety of events and recorded information in conventional PSAPs. For this purpose, MCA is made on the categorical features of the available report forms, and a statistical description is achieved from it by combining bootstr...
The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge of the desired syste... more The main benefits of fuzzy logic control (FLC) allow a qualitative knowledge of the desired system's behavior to be included as IF-THEN linguistic rules for the control of dynamical systems where either an analytic model is not available or is too complex due, for instance, to the presence of nonlinear terms. The computational structure requires the definition of the FLC parameters namely, membership functions (MF) and a rule base (RB) defining the desired control policy. However, the optimization of the FLC parameters is generally carried out by means of a trial and error procedure or, more recently by using metaheuristic nature-inspired algorithms, for instance, particle swarm optimization, genetic algorithms, ant colony optimization, cuckoo search, etc. In this regard, the cuckoo search (CS) algorithm as one of the most promising and relatively recent developed nature-inspired algorithms, has been used to optimize FLC parameters in a limited variety of applications to determine the optimum FLC parameters of only the MF but not to the RB, as an extensive search in the literature has shown. In this paper, an optimization procedure based on the CS algorithm is presented to optimize all the parameters of the FLC, including the RB, and it is applied to a nonlinear magnetic levitation system. Comparative simulation results are provided to validate the features improvement of such an approach which can be extended to other FLC based control systems.
The construction of an efficient and reliable re-entry capsule has played and continues to play a... more The construction of an efficient and reliable re-entry capsule has played and continues to play a fundamental role in the space activities. Current applications include International Space Station sample return, the delivery of networks of small stations to the Martian surface, and the return to Earth of launcher upper stages. Recently (1), (2) attention has been paid to the possibility
This paper describes the software construction methodolo gy embedded in the P-RIO environment, fr... more This paper describes the software construction methodolo gy embedded in the P-RIO environment, from the point of view of modularity, para llelization and graphic configuration of applications. It is presented, as an exa mple, the parallelization of an artificial vision system that uses artificial neural networks for image recognition. This application, that requires a lot of CPU time, had its
This paper describes the support of the software construct ion methodology embedded in a version ... more This paper describes the support of the software construct ion methodology embedded in a version of the RIO environment built on the PVM platform. This strategy attempts to combine in a single environment the high-level facilities prov ided by RIO to make parallel and distributed systems, and the portability offered by the P VM virtual machine that is supported in
This paper describes P-RIO (Parallel Reconfigurable Interconnectable Ob- jects), an object-based ... more This paper describes P-RIO (Parallel Reconfigurable Interconnectable Ob- jects), an object-based software construction methodology, that provides high- level abstractions to build modular concurrent programs, facilitating software reuse and system development. It is also shown the graphic interface integrated to the P-RIO support environment, that provides facilities for configuration, de- bugging and management of parallel applications.
SUMMARY The action of different coagulants to remove Cryptosporidium during the process of water ... more SUMMARY The action of different coagulants to remove Cryptosporidium during the process of water treatment. Cryptosporidium is one of the microorganisms of main concern from the point of view of Public Health, being a priority problem for water treatment plants and water regulatory institutions. Due to its small size and resistance to chlorination, Cryptosporidium removal during the process of drinking water treatment is a hard task. The effectiveness of different coagulants commonly used in the process of removal of oocysts was analyzed. The technique used was the Jar Test. It was found that: 1) coagulants with the addition of polimeric coadjuvants produce over 2 logs of oocyst removal; 2) a low value in turbidity does not necessarily mean optimal parasite removal, and 3) the addition of polyelectrolites to ferric chloride diminishes variability, both in final turbidity and Cryptosporidium removal.
Journal of Neurology, Neurosurgery & Psychiatry, 2011
BackgroundDespite use in clinical practice and trials of thrombolysis, a non-contrast CT is not s... more BackgroundDespite use in clinical practice and trials of thrombolysis, a non-contrast CT is not sensitive for identifying penumbral tissue in acute stroke. This study evaluated how it compares with physiological imaging using CT perfusion.Methods40 imaging datasets with non-contrast CT (NCCT) and perfusion CT (CTP) were retrospectively identified. 2 sets of observers (n=6) and a neuroradiologist made a blind evaluation of
... Within the modified Newton's method (MNM), the tangent matrix is kept constant at each M... more ... Within the modified Newton's method (MNM), the tangent matrix is kept constant at each Moadstep and for all the j iterations. ... Further the consistent solution will be used within a new algor ithm (proposed by the author in the next section) in 222 E. CARRERA order to choose the ...
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Papers by Enrique Carrera